William klocke



W. KLOCKE.

PRESS. APPLICATION FILED JUNE 2, I920.

2 SHEETS-SHEET 1.

Fig].

amen 6oz W. KLOCKE.

PRES S. APPLICATION FILED JUNE 2. I920.

Patented- Feb. 21, 1922.

2 SHEETSSHEET 2.

UNITED *STATES WILLIAM KLOCKE, OFNEW YORK, N. Y.,

PATENTOFFICE.

ASSIGNOR TOE. W. BLISS COMPANY, OF

BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

rimss.

T 0 all whom it may concern Be it known that 1, WILLIAM Knocks, a citizen of the United States of America, residing in Woodhaven, in the borough and county of Queens, city and' State of New York, have invented certain new and useful Improvements in Presses, of which the following is a specification.

This invention relates to presses and aims to provide improvements therein.

The present invention makes use of a lever or levers, and provides a press of great simplicity of construction, and of very compact form.

The invention further provides a press in which the driving force of the plunger slide acts almost entirely in the direction of the reciprocatory movement of the punch (or other) slide, and in which those components of the driving force which are not in line with the movement of the slide are counteracted in the driving connections.

The invention further provides a press in which there is a very symmetrical application of the driving forces, especially to the punch slide.

The invention further provides a press in which the use of gears, especially large gears, may be largely dispensed With, and in which the principal part of the transmission may be carried on the base or bottom part of the press frame.

The invention further admits of presses being built of substantially the same constitutent parts and by minor changes of con struction the punch slide made to deliver a greater or less force.

Embodiments of the invention are illustrated in the accompanying drawings; wherein,

Fig. 1 is a front or rear elevation of a preferred embodiment of the invention.

Fig. 2 is a view in side elevation of the construction shown in Fig. 1.

Referring to said drawings, numeral 10 designates the prcss'frame, preferably comprising a base 12, side pieces, uprights or ties 14, and an overhead yoke 16 connected to the ties or side pieces 14.

20 designates a reciprocatory slide, adapted to carry a punch or the like, which slide conveniently is guided in gibs 22 on the sides of the press.

The means for actuating the slide 20 pref- Specification of Letters Patent. Patented Feb, 21, 1922,

1920. Serial No. 386,042.

erably comprise a lever or levers 25, 25, fulcrumed upon the frame, as indicated at 26.

In the preferred construction, the levers are employed in pairs, and these are preferably fulcrumed on the yoke 16 at or near one of the mid-planes of the press, preferably the transverse mid-planes, the fulcrums of the levers thereby being adjacent or coincident. The swinging ends of the lever or levers preferably extend to the side of the press, and preferably through the side pieces 14, and project on the outer side of said pieces.

Suitable means 30 are provided for rocking the lever or levers 25, and these means preferably comprise a rotary member 33 having an eccentrlcpart 35 thereon, conveniently in the form of a gear having a crank pin thereon, and a connection between said eccentric part and the end of said lever. The said gear is preferably at the side of the press, and carried by a shaft 34 journaled in the base of the frame. The connection between the eccentric part 35 and the end of the lever is preferably a single link 37, and Where the axis of the rotary part 33 is at an angle to the axis on which the-lever turns, the link 37 is connected to the eccentric part 35 and to the lever by means of universal joints or connections 38, 39. Where the levers are employed in pairs, each lever of the pair is preferably actuated from'a mechanism similar to that just described, that is a second gear 33 in the embodiment under discussion, is provided, as well as a second link 37', the gears 33, 33 being preferably mounted upon a common shaft 34 as shown, and in presses for heavy work, or of considerable width,-. the gears 33, 33 are preferably each driven, so that the gears move as nearly as may be in unison.

The movement and force of the levers are preferably transmitted'to the slide 20 by means of a link connection 40, which link is preferably connected, as indicated at 41, to the lever between the fulcrum of the lever and the point of connection of the rocking means 30, thereby having the form of a lever' of the second class, as shown in Fig. 1. The levers move'through a relatively small angle, and the chord of the arc of movement of the point of'connection 41 of the connecting rod 40 to the lever is substantially in line with the direction of reciprocation of said slide 20. By making the moment between the fulcrum of the lever and the link 40 short, as compared with the moment from the link 40 to the point of connection of the rocking means, the force exerted at the end of the lever may be small as compared with the force delivered by the slide 20, and this circumstance enables the gears which transmit the force from the motor or driving pulley to be made comparatively light, thus saving considerably in large and heavy gears.

Moreover in order to construct the press to deliver a greater or less force at the slide 20, this may be readily effected by moving the point of connection of the link 40 to the lever 25 toward or from the fulcrum of said lever. The distance of the eccentric part .35 from its center may be changed, and the link or equivalent 37 substituted by another, if this further change is found to be necessary or desired.

With the present press, it will be seen that the thrust of the lever or levers, transmitted through the link or links 40 is very nearly directly in line with the movement of V the slide 20 throughout the rocking movement of said lever or-levers.

Moreover with a pair of levers the arrangement may be, and is preferably such, that that component of the thrust of one lever, which is. not directly in line with the direction of movement of the slide 20, is counteracted by a similar component of the thrust of the other lever of the pair. Referring to Fig. 1, it will be seen that in the lower position of the slide, the lever would exert a component'of its force diagonall on the slide toward one side of the press. ow.- ever, the other lever of the pair, being in a similar position, will exert a similar component of its thrust on the slide toward its side of the press, and the two components being substantially equal and opposite in direction will counteract or neutralize one another, so that the slide is pressed directly toward its work in the line of its movement without the press frame having to sustain any deflective forces from the slide.

11 order to obtain a symmetrical and stable drive of the slide, the pair or pairs of levers are symmetrically disposed with relation to the mid plane or planes of the slide. Any number of pairs of levers and connections between the levers and slide may be provided to secure the desired symmetry of application of the driving force to the slide.

The invention does not exclude the use of levers of the first and third class; levers of the second class however, being preferable as regards the compactness of the press.

The inventive ideas herein set forth may receive other embodiments than those herein specifically illustrated and described.

What is claimed is 1. A press having a stationary bed, a slide for a punch or the like above said bed, means for reciprocating said slide toward and from said bed, said -means comprising paired levers and means for rocking said levers, said levers being above said slide, and having a connecting rod for each, one end .of' which is connected to a lever and the other end to the slide, each of said connecting rods being connected to its lever between the fulcrum of its lever and the point of connection of said rocking means, the joints of said levers to said connecting rods moving in relatively small arcs, thechords of whlch are approximately in line with the direction of reciprocation of said slide.

2. A press according to claim 1, having the levers fulcrumed at adjacent ends.

3. A press according to claim 1, having the levers fulcrumed at adjacent ends substantially in the mid-plane of the press.

4. A press according to claim 1 including a frame, said levers extending beyond said frame at the respective sides of the press, and said means for rocking said levers being at the outside of said frame.

5. A press comprising a frame having an overhead yoke, and a base, a reciprocatory slide for a punch or the like, and means for reciprocating said slide, said means comprising paired levers fulcrumed at adjacent ends upon said yoke in substantially a midplane of the press and having connections to said slide, the joints of said levers to said slide connections moving in relatively small arcs, the chords of which are approximately in line with the direction of reciprocation of said slide, gearing upon said base, and a link connection between said gearing and the ends of said levers opposite said fulcrums;

In witness whereof, l have hereunto signed my name.

. WILLIAM KLOCKE. 

